Not only are crock pot liners good for no mess cooking but you can use them to transfer food to another contained which is really helpful when taking that cooked dish to another location such as a Pot Luck party.  You can also seal up that liner in the crock pot itself which will help prevent spillage.

I don't find that most of my crock pot recipes stick to the sides or bottom but if you know a recipe which does then that is when the crock pot liner will really be helpful.

The cost of these Crock Pot Liners is really quite small with the cost around 25c each but depending on the brand and the quantity you buy.  Just check the size of the bags so that you get the right size for your crock pot.  The more you buy the cheaper they are.  AMAZON sell them, they sell most things I find, and you can buy in bulk there too.

Why not try them out on your next crock pot meal and avoid the washing up.